Seiko Epson Corporation

Masayuki Mitsuya

Koji Yasukawa

Shunichi Seki

Hidetoshi Yamamoto

Masahisa Otake

A light-emitting device includes an anode, a cathode, a first phosphorescent layer and a fluorescent layer that are provided between the anode and the cathode and emit phosphorescent light and fluorescent light, respectively, upon energization of the anode and the cathode, and an intermediate layer provided between the first phosphorescent layer and the fluorescent layer, the intermediate layer including a hole transport layer and an electron transport layer that are in contact with each other, the electron transport layer being located on the anode side, the hole transport layer being located on the cathode side.

Light-emitting device, light-emitting apparatus, display device and electronic apparatus

A light-emitting device includes an anode; a cathode; a first light-emitting unit provided between the anode and the cathode and having at least one light-emitting layer; a second light-emitting unit provided between the cathode and the first light-emitting unit and having at least one light-emitting layer; and a carrier generation layer provided between the first light-emitting unit and the second light-emitting unit, the carrier generation layer generating holes and electrons in response to application of a voltage between the anode and the cathode. The carrier generation layer includes an n-type electron transport layer and an electron-withdrawing layer, the n-type electron transport layer being positioned between_the first light-emitting unit and the electron-withdrawing layer and containing alkali metal oxide and an electron-transporting material having electron transport properties, the electron-withdrawing layer contacting the n-type electron transport layer and containing organic cyanide having an aromatic ring.

Light-emitting device, display device, and electronic apparatus

To provide a method for producing an organic electroluminescent device having luminescent characteristics of high efficiency and prolonged lifetime and in which the occurrence of defects is suppressed, the organic electroluminescent device, and an electronic apparatus. A method for producing an organic electroluminescent device including a first electrode, a second electrode, and a functional layer disposed between the first electrode and the second electrode, the functional layer including at least a luminescent layer, the method includes the steps of mixing a solvent and a functional material to produce a functional solution; and applying the functional solution to form the functional layer by a wet film formation process, wherein, before the functional solution is produced, the solvent is subjected to dehydration and deoxygenation in order to remove water and oxygen in the solvent.

Method for producing organic electroluminescent device, organic electroluminescent device, and electronic apparatus

Provided is a light-emitting element including a cathode; an anode; a first light-emitting layer that is disposed between the cathode and the anode and emits in a first color; a second light-emitting layer that is disposed between the first light-emitting layer and the cathode and emits in a second color that is different from the first color; and an intermediate layer that is disposed between the first light-emitting layer and the second light-emitting layer so as to be in contact with these layers and has a function of controlling the migration of holes and electrons between the first light-emitting layer and the second light-emitting layer. The intermediate layer is constituted of a first layer that is in contact with the first light-emitting layer and is constituted of a hole-transporting material serving as a main material and a second layer that is in contact with the first layer and also with the second light-emitting layer and is constituted of a material mixture, serving as a main material, of a material having an acene skeleton and a hole-transporting material.

Light-emitting element, light-emitting device, display, and electronic equipment

A light-emitting device includes a cathode, an anode, a first light-emitting layer that is disposed between the cathode and the anode and that emits light of a first color, a second light-emitting layer that is disposed between the first light-emitting layer and the cathode and that emits light of a second color different from the first color, and an intermediate layer that is disposed between and in contact with the first light-emitting layer and the second light-emitting layer and that contains a first material and a second material different from the first material. The light-emitting device satisfies inequality (1):&#x2267;0.4 [eV]&#x2003;&#x2003;(1)wherein LL[eV] is the energy level of the lowest unoccupied molecular orbital of the first material, and LL[eV] is the energy level of the lowest unoccupied molecular orbital of the second material.

Light-emitting device, display apparatus, and electronic system

A light-emitting device includes a cathode, an anode, a first light-emitting layer that is disposed between the cathode and the anode and that emits light of a first color, a second light-emitting layer that is disposed between the first light-emitting layer and the cathode and that emits light of a second color different from the first color, and an intermediate layer that is disposed between and in contact with the first light-emitting layer and the second light-emitting layer and that functions to prevent energy transfer of excitons between the first light-emitting layer and the second light-emitting layer. The intermediate layer includes a first intermediate layer disposed in contact with the first light-emitting layer and mainly containing a first intermediate material and a second intermediate layer disposed in contact with the second light-emitting layer and mainly containing a second intermediate material different from the first intermediate material.

Light-emitting device that includes a plurality of light-emitting layers stacked on top of each other, display, and electronic apparatus

A light-emitting element includes a cathode, an anode, a first light-emitting layer disposed between the cathode and the anode, a second light-emitting layer disposed between the first light-emitting layer and the cathode, a third light-emitting layer disposed between the second light-emitting layer and the cathode, a first interlayer disposed between the first and second light-emitting layers that has a function of preventing energy transfer of an exciton between the first and second light-emitting layers, and a second interlayer disposed between the second and third light-emitting layers that has a function of preventing energy transfer of an exciton between the second and third light-emitting layers, wherein the first interlayer has a hole-transporting property higher than that of the second interlayer, and the second interlayer has a electron-transporting property higher than that of the first interlayer.

Light-emitting element, display device, and electronic apparatus

An organic electroluminescent device includes a substrate on which a pixel region is disposed, and a partition structure including a stack of an inorganic partition made of an inorganic material and an organic partition made of an organic material, and an inorganic protective layer made of an inorganic material covering the surfaces of the organic partition. The partition structure surrounds the pixel region. A pixel electrode is in contact with the partition structure. An organic luminescent layer is disposed over the pixel electrode and covered with a cathode.

Organic electroluminescent device comprising a stack partition structure

A method for manufacturing an organic EL device including an organic EL element provided on a substrate and having a plurality of organic layers including at least a hole injection layer and a luminescent layer, and a cathode and an anode holding the organic layers therebetween includes forming the anode on the substrate, forming the hole injection layer on the anode using a hole injection layer forming material containing an organic material and a metal element, forming the luminescent layer on the hole injection layer, and forming the cathode on the luminescent layer.

Method for manufacturing organic EL device and electronic apparatus

Disclosed is an organic electroluminescent device including: a panel; a partition that defines a plurality of hollows arranged in an anisotropic form in a plan view on the panel; a luminescent portion formed by individually coating a coating solution containing an electroluminescent material on each of the plurality of hollows and drying out the coating liquid coated on the hollows; and a drain means that is formed in the partition to drain part of the coating liquid coated on the hollow so that a surface of the luminescent portion can be flattened.

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Chino, Japan

Masayuki Mitsuya